Related Clues:

• Move furtively - informer
• Tiptoe, perhaps
• Skulking sort
• Behave furtively
• Sort of snake in the grass
• Sly person
• One going behind your back
• Underhanded schemer
• Crafty sort
• Crafty person
• Preview opener?
• '___ Previews' (onetime show of 48-Down)
• Clandestine sort
• Goal line play
• Move covertly